PLEASE HELP WITH MY EASY QUESTIONS ... MATHS AND CHEM

[matt123]

hey guys ... can some 1 please help me on this.
its really basic .... but i dont get it ...

what is "1X10^-8" when expressed in nanometers ( nano = 1X10^-9)


also
...

are these names and formulas correct.

monocarbon tetrachloride = Ccl4

many thanks!

[m@tty]

I'm assuming, is in metres?

If so, to convert units divide by which gives 10nm, or 1*10^1 nm, whichever, they're the same thing.

And yeah, monocarbon tetrachloride is

[luken93]

1 x 10^-8 = 0.000000010
1 x 10^-9 = 0.000000001
Hence, 10 nanometres is equal to 1 x 10^-8
(Think about 1x10^-2m in relation to millimeters)

...

Yep

[matt123]

I'm assuming, is in metres?

If so, to convert units divide by which gives 10nm, or 1*10^1 nm, whichever, they're the same thing.

And yeah, monocarbon tetrachloride is

No the question is this.
the diameter of a atom is 1X10^-8 CM .... ( ITS CM) lol..... convert to nanometers
what would be the answer??

thanks so much guys

[m@tty]

Ok, so it's cm. You can either convert to meters then to nm, or figure out the factor from cm->nm

So,

1 x 10^-8 = 0.000000010
1 x 10^-9 = 0.000000001
Hence, 10 nanometres is equal to 1 x 10^-8
(Think about 1x10^-2m in relation to millimeters)

...

Yep

lol, you mean 1*10^-3?

[matt123]

Ok, so it's cm. You can either convert to meters then to nm, or figure out the factor from cm->nm

So,

1 x 10^-8 = 0.000000010
1 x 10^-9 = 0.000000001
Hence, 10 nanometres is equal to 1 x 10^-8
(Think about 1x10^-2m in relation to millimeters)

...

Yep

lol, you mean 1*10^-3?

thanks so much budd.

but lol what is the final answer... becuase the options are.

a.1X10^1 Nm
b."    " ^ 10
c "   " ^ 19
d. "   " ^-1
e "   " ^-15

i said B off your workings .. but im just double checking.
thanks again

[m@tty]

My final answer was 0.1 nm, so that is equivalent to 10 to the power of what?


Your selection, B, is 10^10, which is 10, 000, 000, 000 nm

Think about it, you should be able to tell which one it is.


No problem mate.

[matt123]

My final answer was 0.1 nm, so that is equivalent to 10 to the power of what?


Your selection, B, is 10^10, which is 10, 000, 000, 000 nm

Think about it, you should be able to tell which one it is.


No problem mate.

The answer is 1X10-1 ..... right? hahaha

[taiga]

omg matt123 is back!

[matt123]

omg matt123 is back!

haha yeah brooo
im doing this basic maths stuff which i havnt done since grade 1 and so i cant remember anythinggg farkkkk im so dumb at the moment.


does anyone know the answer 2 this

v205 + 5Ca = 2V + 5ca0
10 mol of v205 is mixed with 10 mol of ca ... which is the limiting reagent
..... i said Ca .... is that right?

thanks in advanced.

[m@tty]

Yep, you're right. According to the equation there is a 1:5 ratio for V2O5:Ca consumed, so after 10 mol of Ca ha reacted 8 mol of vanadium oxide will remain.

And yes, is correct for your previous question.

[59 Fifty]

U doing pharmacy @ monash? coz im doing pharmacy this yr too, but i dont remember seeing a question like this... and i dont get any of it

[matt123]

nahh mate.

im studying at CSU